Oblique convergent margins accumulate strike‐slip deformation that controls basin formation and evolution. The Bahia Basin is located offshore, proximal to major strike‐slip fault systems that affect northern Colombia. It lies behind the toe of the modern accretionary prism, where the Caribbean Plate is being subducted obliquely beneath South America. This is the first attempt using 3‐D seismic reflection data to interpret a complex strike‐slip basin at the western end of the southern margin of the Caribbean Plate. Detailed 2‐D and 3‐D seismic mapping of regional unconformities and faults is used to describe the structural geometry, timing, and evolution of extensional and strike‐slip faults, which controlled the formation of the basin. Analysis of the fault zones is coupled with a description of the seismic‐stratigraphic units observed within the Bahia Basin to reconstruct the spatial and temporal evolution of deformation and to evaluate the influence of the pervasive shale tectonics observed in the area. The results, presented as a series of structural‐paleogeographic maps, illustrate an initial stage of transtension that controlled the formation of shale‐withdrawal minibasins from late Oligocene to late Miocene times. The continuous deformation and northward expulsion of the Santa Marta Massif resulted in transpression during Pliocene times, leading to basin inversion and ultimate closure of the basin. Basin evolution along the southern Caribbean oblique, convergent margin, shows the occurrence of a complex interaction between subduction and major‐onshore strike‐slip fault systems and illustrates how strain‐partitioning led to the break‐up and lateral displacement of early accretionary prisms formed along the margin.

中文翻译：

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斜向边缘上的盆地演化和页岩构造：巴伊亚盆地，哥伦比亚加勒比海近海

倾斜的会聚边缘累积了走滑变形，从而控制了盆地的形成和演化。巴伊亚盆地位于海上，靠近影响哥伦比亚北部的主要走滑断层系统。它位于现代增生棱镜的脚趾后面，加勒比板块在南美洲下方倾斜俯冲。这是首次使用3D地震反射数据解释加勒比板块南缘西端的复杂走滑盆地。区域不整合面和断层的详细2D和3D地震图用于描述构造几何学，定时和伸展断层和走滑断层的演化，从而控制了盆地的形成。对断层带的分析与对巴伊亚盆地内观察到的地震地层单元的描述相结合，以重建变形的时空演化并评估该地区普遍存在的页岩构造的影响。结果以一系列结构古地理图表示，说明了从渐新世晚期到中新世晚期控制页岩撤出微盆地形成的初始阶段。圣玛尔塔地块的不断变形和向北驱逐导致了上新世时期的高压转换，导致盆地倒转和盆地的最终封闭。沿加勒比南部倾斜，汇聚边缘的盆地演化，